package com.xiaodong.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.xiaodong.reggie.currency.BaseContest;
import com.xiaodong.reggie.currency.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @description: 检查用户是否已经完成登录
 * @author: Jie
 * @date: 2022/8/10 9:48
 **/
@Slf4j
@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")

public class LoginCheckFilter implements Filter {

    private static final AntPathMatcher antPathMatcher=new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();
        //2、判断本次请求是否需要处理
        //定义不需要处理的请求路径
        String[] urls = new String[]{
                "/backend/**",
                "/front/**",
                "/employee/login",
                "/employee/logout",
                "/user/sendMsg",
                "/user/login",
                "/currency/**"
        };
        boolean check = check(urls, requestURI);
        //3、如果不需要处理，则直接放行
        if (check) {
            filterChain.doFilter(request, response);
            return;
        }
        //4-1、判断登录状态，如果已登录，则直接放行
        if (request.getSession().getAttribute("employee") != null) {
            Long id = (Long) request.getSession().getAttribute("employee");
            BaseContest.setId(id);
            filterChain.doFilter(request, response);
            return;
        }

        //4-2、判断登录状态，如果已登录，则直接放行
        if (request.getSession().getAttribute("user") != null) {
            Long userId = (Long) request.getSession().getAttribute("user");
            log.info("本用户的id=={}",userId);
            BaseContest.setId(userId);
            filterChain.doFilter(request, response);
            return;
        }

        //5、如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }
    @Override
    public void destroy() {
    }
    public boolean check(String[] urls, String requestURI) {
        for (String url : urls) {
            boolean match = antPathMatcher.match(url, requestURI);
            if (match) {
                return true;
            }
        }
        return false;
    }
}